peters



2 Sheets-Sheet 1. J. COX.

(No Model.)

PUMP.

Patented Ma.1'.6,

N. PEYERS. Phono-mhugrapmr. wnhinghw. D. C.

(No Model.) z sheets-sheet 2.' J. COX.

` PUMP. No. 273,261. P-atented,Ma,r.6,1883.

, N. Firma nmumngnpher. wnhmgwn. D. c

PATENT JOHN coX, or ALBANY, New YORK.

PUMP.

SPECIFICATION forming'ipart of Letters Patent No.4 273,261, dated March 61883.

Application filed October 20, 1882.

vcompressing air in Vessels containing lagerbeer, mineral water, and otherlquids, in which acompressing-cylinder, elbow escape-pipe provided with a foot-valve, a piston provided with a check-valve, and vented piston-rod operated by a foot-lever, co-operate to alternately fill the chamberwith airand force thesame out through the exit-pipe, and a hose into the vessel to be subjected to pneumatic pressure, and also in which a spiral spring, foot-lever, and pivoted fulcrum-link operate to alternately depress and elevate the piston and vented piston-rod.

The object of my invention is to provide a simple and durable air force-pump by which an operator with the pressure of his foot will readily force air into vessels containing liquids, and thereby produce pneumatic pressure in the vessel for facilitating the draft of liquids from the same, I attain this object by means of the mechanism illustrated in the accompanying drawings, forming a part of this specication, in which- Figure l represents a perspective view of the force-pump embodying the improvements' in this invention. Fig. 2 is a horizontal view from above of the same. Fig. 3 is a sectional elevation taken at line No. 1 in Fig. 2; and Fig. 4. is a cross-sectional view taken at line No. 2, Fig. 3, and illustrating the stem of the foot-valve and chambers at its sides.

The same letters of reference indicate like parts throughout the several views.

ln the drawings, A represents the cylinder ot' the apparatus. A is its head, and B its bottom, which head and bottom are securely connected tothe body of the cylinder by screwthreads, as shown, with a gasket-packing at the foot of the cylinder, and between its lower edge and the bottom. U is an elbow exit-pipe leading from port a at the bottom of the cylinder to the foot-valve chamber b, which foot-valve chamberis located (No model.)

within coupling-nut D, connecting nipple el with elbow escape-pipe C. The upper end ot' elbow escape-pipe Ulis provided with a circular bore, c, made central therein, which operates as a seat for stem c of the foot-valve E. 'lhe stem of said foot-valve is made with a triangular form, as shown in Fig. 4, -with its diameter corresponding with the diameter of bore c, so as to nicely iit within the same and freely move therein. The upper end of stem c `ot' valve E is provided with a notched head, e',

having a rubber washer beneath. The lower surface'side of said washer sets on the projecting rim of the marginal end of bore c', which projecting rim operates as the seatof the valve. f

Working within cylinder Ais the pistonhead F, havingits periphery covered by leather packingj', held in place by washer g and clampthe lower side of piston-head F is check-valve G, having its stem supported and steadied centrally within valve-seat H, which isscrewed up into the screw-threaded recess shown 'in the bottom side of the piston-head in Fig. 3. Beneath the head of stem z' of the valve is a rubber washerm, the lower sideof which rests on the upper surface of seat H, as shown. The said washer and its stem constitute valve G, which is free to be moved vertically in the chamber above said seat.

J is the piston-rod, which rod is secured to head F by screw-threads, as shown. The said v rod is made with a tubular forni, with its central bore, j, communicating with the valvechamber below, and its upper lend open to the outer atmosphere by inlet-openin g or mouth L is the head of the piston-romand is provided with ears l l. Arranged around the tubular piston-rod and between head A' ot' the cylinder and the lower end of head L of said rod, is a stiff openly-coiled spiral spring, M, made with sufficient strength to carry the piston-head and its adjunctive parts upward through the entire vertical heightof the chamber of cylinder A when relieved of pressure. The piston-rod J and its attached piston-head F are steadied in their vertical movements alternately up and down by the former working through a central perforation, m, made in head A' of the cylinder, and the piston-head bear- ICO ing against the surface ofthe bore of said cyll in Fig. 4, and as indicated by arrows in Fig.

inder.

N is a foot-lever pivoted to the ears of the head of the piston-rod, as shown. The forward end of said lever is made to curve downward, and has its lower end provided with step-piece N. The rear end of the lever is pivoted to the link-fulcrum l?, which link-fulcrum is made with a length considerably greater than the height of cylinder A, and is pivoted at its lower'end to the ears ofjoint-connection piece Q, which is to be secured to the door or to a board or bottom piece, R, to which is also secured cylinder A.

The nipple d may be provided with a stopcock,-d, as shown in Fig.v1.

The manner in which the parts of my abovedescribed apparatus operate is as follows: The nipple d is made to enter one end of hose S, which communicates by its other end to the vessel of liquid to be subjected to pneumatic pressure by compression of air within. lfnipple d is provided with a stop-cock, d', which is advantageous when operating with vessels containing mineral waters, the stop-cock is to be turned open. The operator wiil then, with his foot placed on step N of lever N, depress said lever, when the rear end of the same will be held from rising by the link-fulcrum, while the piston-rod and piston-head will be forced down to the bottom of the chamber of cylinder A. The piston-head and its rod being steadied, as before described, will descend vertically, while the link-iulcrum will be oscillated to a small distance backward from the cylinder, with its lower end moving on the pivot of its joint-connection Q. When the piston begins to descend the check-valve G will, by the pressure from the air beneath, be forced upward against the lower end of pistou-rod J, and eiectually close the lower end of its bore, while at the same time the air will be made to escapefromthechamberofthe cylinder through port a, and pass thence through elbow-pipe G and through the chambers v o o' at the sides ofthe triangular-shaped valve-stem e, (shown 3,) when the foot-valve E will be raised in its chamber b, and the air will enter said chamber and pass thence through the notch of the notched head e at the top of said footvalve, and escape thence through nipple d and hose S into the vessel to be charged with compressed air. When the foot-lever is released from the pressure of the operators foot the spiral spring M will force the piston upward, when check-valve G, relieved of its upward pressure, will drop down on its seat below and away from the lower end ofthe bore of the tubular piston-rod, while at the same time the foot-valve E will drop down on its seat at the upper end of the elbow escape-pipe and close the same against the return of the air to the cylinder, and the air will pass from the outer atmosphere down through the bore j of the piston-rod, and thence into the chamber of cylinder A, as indicated by arrows in Fig. 3.

By the alternate depression and elevation ot' Q, substantially as set forth, for operations dei scribed.

2. The combination, with cylinder A, provided with head A', and havingpiston-head F, provided with a rigid and vertically-fixed piston-rod, of spiral spring M, foot-lever N, and a linkfulcrum, P, pivoted to a joint-connection, all foroperation substantially as seti'orth.

JOHN COX.

Witnesses ALBERT S. RoBINsoN, CHARLES SELKIRK. 

